java - 从对象内的对象调用方法？(Java)

Question

我尝试过搜索和阅读(听起来类似)问题，但我似乎找不到解决方案。

我目前正在制作一个原型(prototype)来通过文本输入控制一些灯。文本输入已经正常工作，它可以正确过滤输入并仅挑选出相关部分。

无论如何，现在为了使其有用，我需要首先创建我的房子的对象，其中包含所有楼层，其中包含所有房间，其中包含所有 Actor (灯等)。

这些是所有这些对象的片段，从上到下，因为它们应该堆叠在彼此内部(代码尚未完成也未优化，我知道我可以对所有 if-else 语句使用 switch-case ):

import java.util.ArrayList;

public class Building {
    String Name;
    ArrayList<floor> floor = new ArrayList<floor>();

    public Building(String Name){
        this.Name = Name;
    }

    public boolean checkFloor(String Name){
        int count = floor.size();
        boolean ret = false;
        while(count < floor.size()){
            if (floor.get(count).Name == Name){
                count = floor.size();
                ret = true;
            }
            count++;
        }        
        return(ret);
    }

    public void newFloor(String Name){
        Name = Name.toLowerCase();
        if (Name == "keller" || Name == "basement"){
            floor basement = new floor("basement");
            floor.add(basement);
        }
        else if (Name == "eg"){
            floor ground = new floor("eg");
            floor.add(ground);
        }
        else if (Name == "1og"){
            floor first = new floor("first");
            floor.add(first);
        }
        else if (Name == "2og"){
            floor second = new floor("second");
            floor.add(second);
        }
        else if (Name == "3og"){
            floor third = new floor("third");
            floor.add(third);
        }    
            }    
    public void newRoom(String Floor, String Name){        
    }

}

<小时/>

    public class floor {
    String Name;
    ArrayList<room> room = new ArrayList<room>();
    transcoder transcode = new transcoder();

    public floor(String Name){
        this.Name = Name;
    }



    public boolean checkRoom(String Name){
        int count = room.size();
        boolean ret = false;
        while(count < room.size()){
            if (room.get(count).Name == Name){
                count = room.size();
                ret = true;
            }
            count++;
        }

        return(ret);
    }

    public void newRoom(String mName){
        String Name = transcode.getRoom(mName);
        if( Name == "ground"){
            room ground = new room("ground");
            room.add(ground);
        }
        else if ( Name == "basement"){
            room basement = new room("basement");
            room.add(basement);
        }
        else if ( Name == "first"){
            room first = new room("first");
            room.add(first);
        }
        else if ( Name == "second"){
            room second = new room("second");
            room.add(second);
        }      
    }
}

<小时/>

public class room {
    String Name;
    ArrayList<Actor> Actors = new ArrayList<Actor>();

    public room(String Name){
        this.Name = Name;
    }

    public void addActor(String Name, int Type, String Address, int Channel, boolean Dim){
        Actors.add(new Actor(Name, Type, Address, Channel, Dim));
    }

    public void removeActor(String Name){
        int count = 0;
        while (count <= Actors.size()){
           if (Actors.get(count).Name == Name){
               Actors.remove(count);
               count = Actors.size();
           }
           count++;
        }
    }

    public boolean containsActor(String Name){
        int count = 0;
        boolean ret = false;
        while (count < Actors.size()){

                if (Actors.get(count).Name == Name){
                    ret = true;
                    count = Actors.size();
                }
                count++;
            }
        return(ret);
    }

    public String getAddress(String Name){
        int count = 0;
        String ret = "leer";
        while (count < Actors.size()){
            if (Actors.get(count).Name == Name){
                ret = Actors.get(count).Address;
                count = Actors.size();
            }
            count++;
        }
        return(ret);
    }

    public int getType(String Name){
        int count = 0;
        int ret = 0;
        while (count < Actors.size()){
            if (Actors.get(count).Name == Name){
                ret = Actors.get(count).Type;
                count = Actors.size();
            }
            count++;
        }
        return(ret);
    }

}

<小时/>

public class Actor {
    String Name;
    String Address;
    int Channel;
    int Type;
    boolean Dim;
    int On; //muss noch deklariert werden!
    int Off;


    public Actor(String Name, int Type, String Address, int Channel, boolean Dim){
       this.Name = Name;
       this.Type = Type;
       this.Address = Address;
       this.Channel = Channel;
       this.Dim = Dim;
    }
}

我现在在主类中尝试做的是创建一个带有地板、房间和一些 Actor 的新建筑。代码如下:

System.out.println("Gebäudename eingeben(egal): ");
String Name = user_input.nextLine();
Building Building = new Building(Name);
System.out.println("Stockname eingeben(eg): ");
Name = user_input.nextLine();
Building.newFloor(Name);
System.out.println("Raumname eingeben(wohnen): ");
Name = user_input.nextLine();
Building.floor

现在在 Building.floor 的最后，我不太明白如何向对象楼层添加一个新房间。我很感激任何帮助，因为我还不太喜欢 Java，并且可能缺少一个明显的部分。

Answer 1

为了回答您的问题，在建筑物的地板上添加新房间的最简单方法是:

Building.floor.get(0).newRoom(Name);

floor 是一个 ArrayList，在第一个索引上调用 get() 将允许您调用 newRoom()。

一些使您的代码更具可读性/易于理解的建议:

• 通过将 floor 更改为 Floor，将 room 更改为 Room，将类名称大写。

• 将 ArrayList 的名称从 floor 更改为 floors。

• 将 ArrayList 的名称从 room 更改为 rooms。
• 在主类中声明单独的 String 变量来存储用户输入。
• 在添加到适当的 ArrayList 之前单独存储对象。

我想说的最重要的事情是向您的 Building 类添加一个 getFloor() 方法。

像这样(假设您进行了上述更改):

public Floor getFloor(String floorName){
    Floor correctFloor = null;
    for(Floor floor : floors) {
        if(floor.Name == floorName) {
            correctFloor = floor;
        }
    }
    return correctFloor;
}

那么你代替

System.out.println("Gebäudename eingeben(egal): ");
String Name = user_input.nextLine();
Building Building = new Building(Name);
System.out.println("Stockname eingeben(eg): ");
Name = user_input.nextLine();
Building.newFloor(Name);
System.out.println("Raumname eingeben(wohnen): ");
Name = user_input.nextLine();
Building.floor.get(0).newRoom(Name);

您可以输入(再次假设上述更改)

System.out.println("Gebäudename eingeben(egal): ");
String buildingName = user_input.nextLine();
Building building = new Building(buildingName);
System.out.println("Stockname eingeben(eg): ");
String floorName = user_input.nextLine();
Floor floor = new Floor(floorName);
building.newFloor(floorName);
System.out.println("Raumname eingeben(wohnen): ");
String roomName = user_input.nextLine();
building.getFloor(floorName).newRoom(roomName);

这些只是建议，您可以通过多种方式做到这一点~祝你好运!